When clicking and dragging to perform an interchanger there are often multiple choices but never more than 9. It would make things easier if one could pick the correct interchanger by pressing a number key rather than using the mouse.
I think there can sometimes be more than 9 options. But nonetheless, I agree it would be good if the user could click numbers 1 through 9 to choose one of the first ones.
When clicking and dragging to perform an interchanger there are often multiple choices but never more than 9. It would make things easier if one could pick the correct interchanger by pressing a number key rather than using the mouse.